Fedora 14 2.6.35.14-106.fc14.x86_64 High Load

Hi, I've noticed that our server has a high CPU load. Our server is a mail server setup with Fedora 14 it has a dual-core AMD Opteron, 8GB of RAM and twin 1TB SATA drives in software Raid 1. We originally had a CPU load greater than 20, which we believed to be caused by this bug https://bugzilla.redhat.com/show_bug.cgi?id=650934 We upgraded the kernel to the latest version (kernel-2.6.35.14-106.fc14.x86_64) using 'yum'. Although the CPU load has now dropped to below 3, it still averages at about 2.6. According to a 'top' there are no processes using a high percentage of CPU and the CPU is mostly on idle. After reading the bug report I've installed 'powertop'. This is showing the following: Top causes for wakeups: 64.5% (2418.3) [kernel scheduler] Load balancing tick 23.8% (890.8) [extra timer interrupt] Any ideas what is causing this and how to fix the issue? Please let me know if you need any extra information!! Thanks, Tom